Disk-type chain insulator.



L. STEINBEBGER. DISK TYPE CHAIN-INSULATOR. APPHCAUON FILED SEPT- 21. I912.

Patented Jan. 16, 1917.

2 SHEETS-SHEET I.

WIT M58858 I memos ATTORNEY L. STEINBERGER.

I V DISK TYPE CHAIN msuunon.

APPLICATIONFILED SEPT-ZILIBIZL 1,212,703, I Patented Jan. 16, 1917.-

' 2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

' LOUIS S'TEINBERGER, or BROOKLYN, NEW Yo RK.

e y i DISK-TYPE To all'wfiom itmay concern:

" Be. it known that I, LOUIS STEIXBE'RGER, residing'at Brooklyn, in the county of Kings i State of New York,- have inventedcer- 5 tain new and useful Improvements in Disk- .Type Chain Insulators, ofwhich the folflowing is a specification. X

This invention relates to disk-type chain insulators adapted for use in connection.

with "high potential electric conductors as employed for "ariouspurposes, and the par-' 3; tlcular object sought to be attained. is to provide an improved form ofunit, of'the disk type, adapted to be arranged in flexible, concatenated relation. A. furtherI object is to providea disk in ,sulator unit having opposed strain members .pivotally'connected together so that at least one of said strain members will have pivota-l movement free of the body of insulating material. 9 i Y y vAfurther object is to arrange the attach- ,ing means at. the \ends of the strain members, for attaching said strain members to supports, so-that the unit will be permitted .Jpivotal movement in oneplane relatively y ,to the support of one strain member and in another plane relatively to the support of :11 the other strainmemben'and further to arrange the pivotal connection between the two strain members of the unit so that the Hplane' ofmovement therebetween is at an angle to theplane of movement between at .lBfiSfi one of saidflstrain members and the support 'of saidlstrain member, this latter 3. feature. being designed particularly for permi'tting 'a desirable degree of flexibility between all the units of a structure but at the samef time serving to prevent excessive or violent swinging thereof, as will be hereinafter particularly pointed out. 1 Other objects and aims of theinvention, I more or lessspecific than those referred to above, will be in part obvious and in part pointed out in the course of the following description of the elements, combinations, arrangements of parts and applications of principles constituting the lIlVI1t10H:- and 'the scope of protection contemplated will -be indicated in the appended claims.

In the accompanyingdrawings which are to be taken-as a part of this specification,

and in i which 1 have shown a merely pre- 1 W feipredfform of embodiment it of. the 1nven-.

fis tiohrFigure 1 is atransverse, vertical, sec-.1 tionalviewthrough an Insulator un1t condisk and depend for a.

CHAIN INSULATOR.

Specification of Letters Patent. t t d Jan 1 191 Application filed September 1912.. Serial No. 721.693.

structed in accordance with the principles of this invention, said section be"ng taken substantially on the plane of lin 11 of Fig. 2, one of the strain menib rs being shown in full line; Fig. 2 is a view similar to Fig. 1 taken at right angles theretosubstantially on the plane of line 2 2 of Fig. 1; Fig. 3 is a bottom plan viewfof the structureshown in Figs. 1 andi; and" Fig. l

is a side, elevational view ofaplurality of units supported in concatenated relation. I I

In devising the structure hereof I have .sought to cheapen and simplify the construction of disk type insulators adapted for use especially in concatenated relation, though. of course, a single unit may be used by itself when desired. I have provided an insulator unit possessing extremely high insulating qualities, and these qualities are not impaired by an v.reasonable amount of swinging or swaying of the concatenated units. The units themselves are flexible, each comprising a pivotal part, but the insulating material is so distributed that an ample. bulk thereof is at all times maintained between opposing conductors comprised therein regardless of the rotary swinging position of the pivoted parts. and the pivoted portion is so disposed'with relation to the disk and protective parts car- 'ried thereby as to be practically immune from attack by the elements.

It will be understood that the concatenated structure illustrated comprises units of substantially identical construction. These units, however, are preferably of varying sizes and insulating values, the unit of greatest insulating value being disposed next adjacent the supported conductor so as to encounter the highest voltage therefrom, and subsequent units being of proportionately decreasing values, to correspond to the decreasing voltage. In this manner a maximum efficiency is secured for each of the respective units.

. A description of one unit will apply equally to all, and referring to the drawings by numerals for describing a unit in detail,

the reference numeral 1 indicates adisk of surface thereof. One ormore annular skirts 3 are formed upon the under surface of the distance] about the lobe 2 so as to more effectually protect the same against direct attacks of the elements, and to prevent a flow of moisture along the under surface of the disk toward the lobe.

the upper surface of the disk.

- The upper surface of the-disk preferably inclines. in all directions downwardly from a central point so as to lead rainwater away from the center of the disk. I

Extending axially through thedisk is a strain member 4 formed with an attaching eye 5 at its upper end, which projects abbve The lower portion of the strain member 4 is formed into an enlarged ring shaped portion 6 which is received within the material of the lobe 2 and is entirely enveloped and concealed thereby, the material of the lobe not only covering the outer surface thereof. but also filling the space between its circular walls.

The second strain member as 7, is of substantially U-shape, having spaced legs 8 extending upwardly upon opposite sides of the lobe. A bolt 9 extends transversely through the material of the lobe and engages the upper ends of the legs of the strain member-7. being formed with a head 10 at one end and having a cotter pin. or other fastening means 11, atits opposite end for holdingit against accidental detachment from suitable apertures 12 in the upper ends of the legs 8. \Vashers 13 are interposed between the inner surfaces ,of the legs 8, and

' the outer surfaces of the lobe 2 for spacing terial intermediate its outer surface and the the legs slightly from the urface of the lobe; a metal lining 14 is fitted within the insulating material of which the lobe is formed. so as to'serve as a bearing within which the bolt 9 may freely rotate without any danger of wearing the material of the lobe, This lining is arranged substantially centrally of the ring portion 6 of the strain member 4; and is of such proportionate size as to leave an ample bulk of insulating mainner surface of the ring shaped portion 6 of the strain member 4. The opposite ends of the lining 14 are flared into annular portions 15 serving to positively prevent any endwise movement of the lining and consequent abrasion. or wearing of the material of the lobe. The portions 15 also serve to rovide a relatively wide-bearin surface against which .the washers 13 may wear. The bolt 9 and its associated parts comprise a pivotal mounting for the strain member 7, and thus interlinks .with the strain mem-.

ber 4pin such manner that tension strain applied to the strain members tends to force the bolt. toward the inner surface of the ring 6, which tendency is resisted by the interposed insulating materiah The fracture or destruction-of this interposed material might allow-a physical contact be tween the two strain members, but would.

not permit a 'derangementiof the ooncate structure to the rod 9' of the'seoond nated structure of which the unit forms-a part, such as would permit the supported conductor to fall. The bolt 9 audits associated parts, forming the pivot for the strain member 7, is also disposed close upbeneath the under surface 'of' the disk sothat the disk and the protective parts on the disk will effectually protect said pivotal parts from attacks of the-elements. I

, The strain member 7 is rounded at its lower portion as at. 16 and the material of the lobe is so'shaped as to practically fill the space between the legs 8, being rounded to fit the portion 16, and this shape is arranged in substantially concentric relation to the pivot 9 so that the material of the lobe practically fills the space within the hollow of the strain member 7 regardless of the rotary position of said strain member. and thus more effectually prevents puncturing throng the lobe bet'weenthe juxtaposed portions of the two strain members.

, A suitable attaching eyel'l' is formed upon the lower-portion of the strainmember 7, andthis eye, and likewise the eye 5 of the strain member 4', may obviously be of two'- part formation as shown at 18 in Fig. 4 if desired I The structure thus developed. when assembled'in concatenated relation provides a satisfactorily, though not too flexible formation. In all units the eyes 5 and 17 are in substantially righflangular relation, and in aconcatenated structure this featureserves to limit, to a satisfactory degree, the tendency to violent swinging, as from a heavy wind, orotherwise, of the structure, or of -.the units of the structure, as will beclearly apparentQ-from an inspection of Fig. 4 of the drawings. In this. figure it will be seen that, in swinging to the right or left, the only-joints which will be called intoplay .as pivots will be the joints between the first and second nit, and the joint at rod 9 of the second l nit. The member 7 ofthe first unit would remainipractically stationary.

xiii

If the wire 20 is held against longitudinal movement'then the only app1'eciable .move-' ment possible would be a lifting movement upon thewire occasioned. by. rotation of the second insulator unitabout its pivotal .connection with the member 7'of. the first unit, this pivotal movementwould swing the rod 9 ofthe second .unitin, an arc tothe right or left and-lift the wire and the third unit'bodily upward: The are of swingof the member9 would be so small as to result in a considerable lift for a comparatively slight swing, and would :consequentlyefl'ectively re- 'sist the swinging .of, the structure.. -Supposingthe ire 201:0 becapable of free longitudinal movement, 01-10 b turned at right an- Iii gles' to the position illustrated at Fig.4,then 5 the third or bottom unit wouldswing as a stiif unit.

unit, and the pivotal connection at 9 of the second unit would perform no office.

The eye 17 of the lowermost insulator unit is engaged by suitable means, as the link 18, for connecting thereto a clamp or other attachingmeans 19' for directly engaging and supporting the line wire 20.

s many changes could be made in this I construction without departing fromv thescope of the following claims it is intended that all. matter contained-in the above description or shown in the accompanying drawing shall be'interpreted as illustrative only and not in a limiting sense.

Having thus described my inv'ention what-.

I claim as new and desire to secure by Letters Patent, is: p y a 1. In a disk type; insulator, the combination comprising a disk'of insulating material having an integrally formed lobe pendant therefrom, a strain member extendmg from the upper side of said disk, a strain member extending from the lower side of insulating material and havin said disk, said last mentioned -strain meniber being U-shaped and com rising spaced end portions extending an rately formed straight pivot rod extendin through a straight aperture formed throu the material of the lobe from one of said spaced end portions to the other, said pivot rod being connected with said spaced end portions to form a pivotal connection betweensaid second strain member and said lobe. r l

2. In a chain insulator, the combination comprising a plurality of separately formed terminating upon opposite sides of said lobe, and a se )aunits, each unit being formed of a body of a a pair of strain members pivotally interlmking with each other within the body of insulating material, each strain member having a pivot' portion at its outer end, and the pivot pore tions at the outer ends of the strain members of at least some of said units being disposed in substantially right angular relation to the portions of the strain members constituting -the pivots within the respective? units, for the purpose described.

a In testimony whereof I aifix my signature in the presence of two witnesses.

LOUIS STEINBERGER.

Witnesses:

L. GESSFORD HANDY, NATHALIE.THOMPSON. 

